Challenged Conventions

In our film wanted to challenge a convention. Some possible ideas we had were:
-filming in daylight
-using a female murderer
-cheerful music instead of tense
- the victim to be a man

The convention that we have decided to challenge is we are going to use a woman instead of a male as the killer.
I think that this is going to work really well in our film, especially the way we are going to use the shot of the heels and the female victim as its unusual for a female killer to kill another female, its usually a "feminist" type female getting her revenge on males, like in the film Monster.